Hyung-ki Joo (Korean: 주형기; RR: Ju Hyeong-gi) is a British-Korean pianist, composer, comedian and one half of the comedy-musical duo Igudesman & Joo. Billy Joel chose Joo to arrange and record his classical piano pieces for the album Fantasies & Delusions. It was recorded in the Mozart Hall of the Vienna Konzerthaus, and reached the No. 1 spot on the Billboard album chart for 18 weeks.